What is the tire pressure for a Mercedes-Benz C-Class?

[DiMiguel]

According to the international GBT2978-2008 standard, the standard tire pressure for a Mercedes-Benz C-Class is 2.4-2.5 bar. In winter, the tire pressure should be slightly increased by about 0.2 bar based on the standard tire pressure. In summer, the tire pressure can generally be about 0.1 bar lower than the standard to prevent tire blowouts due to high temperatures. Tire pressure reset method: First, turn on the ignition switch, press and hold the tire pressure monitoring reset button until you hear a "beep," then release it. The tire pressure monitoring system will store the current normal tire pressure data, automatically clear the previous data, and finally, the warning light on the dashboard will turn off, indicating the tire pressure reset is complete. There are generally three reasons for abnormal tire pressure: Abnormal tire pressure: The system will alert if the pressure is generally below 1.8 bar or above 3.0 bar. In this case, the tire needs to be checked and the pressure adjusted. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure reset is not performed in time, the tire pressure monitoring system will still record the previous data, causing the tire pressure monitoring indicator light to turn on. In this case, simply perform a tire pressure reset. Damaged tire pressure sensor: The tire pressure sensor is used to monitor tire pressure and is directly installed inside the tire, connected to the tire inflation valve. If the sensor is damaged during driving, it can also cause the tire pressure warning light to turn on. For sensor damage issues, only a replacement with a new part is possible.

[DelCollin]

I've been driving this Mercedes C-Class for several years, and tire pressure is something you really need to pay attention to. When driving alone, 2.3 bar for the front tires and 2.2 bar for the rear tires are sufficient; if traveling with the whole family, it's recommended to inflate the rear tires to 2.4 bar. The small sticker on the door frame clearly states that measuring when the tires are cold is most accurate. If the tire pressure is off, the steering wheel feels heavy, and the tires are prone to bulging. I usually check it when filling up the tank. The Mercedes tire pressure monitoring system is quite sensitive—if the light comes on, adjust it immediately. In winter, inflate to the upper limit, and in summer, aim for the middle value. Especially before highway driving, you can't afford to be careless.

[StEmilio]

Many Mercedes-Benz C-Class owners ask about tire pressure during car repairs. Actually, the most reliable source is the label on the fuel tank cap or the driver's door frame, which usually indicates a range of 2.1-2.5 bar. For common 17-inch wheels, the recommended pressures are 2.3 bar (front) and 2.1 bar (rear) when unloaded, and 2.4 bar (front) and 2.3 bar (rear) when fully loaded. It's best to measure with an electronic tire pressure gauge in the morning before driving. High tire pressure makes the ride uncomfortably bumpy, while low pressure increases fuel consumption and damages the tire sidewalls. Remember to check the tire tread grooves every 5,000 kilometers—if uneven wear is noticed, adjust the pressure accordingly. Also, keep the spare tire at 2.8 bar for emergencies.

[DelJordan]

During the last maintenance of my AMG C43, the technician mentioned that the tire pressure for sports models differs from the standard version. The factory recommends 2.6 bar for the front tires and 2.8 bar for the rear tires, while the regular C-Class is around 2.4 bar front and 2.2 bar rear. Extra caution is needed when upgrading to larger rims—my friend damaged his wheel rim due to insufficient tire pressure. The vehicle's infotainment system displays real-time tire pressure and triggers an alarm if it drops below 1.8 bar. Once, the low-temperature warning light came on, but after inflating to 2.3 bar at the repair shop, it returned to normal.